Asphaltic material and method

Abstract

An improved asphaltic material useful for sealing or patching of porous, interstitial substrates such as concrete or asphalt is provided which achieves superior results by flowing into and at least partially filling the substrate interstices themselves, as opposed to serving merely as a surface coating. The material preferably includes a conventional CRS-1H cationic asphaltic emulsion, respective quantities of a vinyl acrylic copolymer and a NEOPRENE latex. In one type of sealing application, a diluted quantity of the asphaltic material is heated to about 160° F. and is flooded over the substrate to be sealed; the liquid passes into and fills the substrate voids, and, after hardening of the material, an effective, gasket-like seal for the substrate is presented which retains its integrity during varying ambient weather conditions and under hard use.

Having thus described the invention, what is claimed as a new and desired to be secured by Letters Patent is: 
     
       1. An asphalt material for use with concrete or the like, comprising: from about 50 to 95% by weight of an aqueous asphaltic emulsion; and   respective quantities of a vinyl acetate-acrylic copolymer and a latex having chloroprene as the primary monomer therein and having a solids content of from 40 to 60%, said respective quantities together totaling from about 5 to 50% by weight of the material,   said copolymer and latex serving to give the asphalt material a degree of resiliency for sealing purposes.   
     
     
       2. The material as set forth in claim 1 wherein said emulsion is a cationic emulsion. 
     
     
       3. The material as set forth in claim 1 wherein said emulsion includes about 65% by weight asphaltic solids, an aqueous phase, and at least one surfactant. 
     
     
       4. The material as set forth in claim 1 wherein said emulsion is present at a level of about 90% by weight. 
     
     
       5. The material as set forth in claim 1 wherein said copolymer is present in an amount in excess of said latex. 
     
     
       6. The material as set forth in claim 1 wherein said copolymer has a solids content of from about 50 to 60% by weight. 
     
     
       7. The material as set forth in claim 1 wherein said latex is a carboxylated polymer having a standard solids content of from about 40 to 50% by weight. 
     
     
       8. The material as set forth in claim 1 wherein said respective quantities together total about 10% by weight, said copolymer being present at a level of about 7% by weight, and said latex being present at a level of about 3% by weight.